申请人:Bridgestone Sports Co. Ltd.
公开号:EP1358914A1
公开(公告)日:2003-11-05
A golf ball is characterized by comprising a molded and vulcanized product of a rubber composition as a constituent component, the rubber composition comprising 100 pbw of a base rubber composed primarily of a polybutadiene containing at least 60 wt% of cis-1,4-bond, having a Mooney viscosity (ML1+4, 100°C) of at least 30, and synthesized using a rare-earth catalyst, 15-50 pbw of an unsaturated carboxylic acid and/or a metal salt thereof, at least 2 pbw of a processing aid having a highest melting point of up to 115°C, and at least two organic peroxides including an organic peroxide having the shortest half-life at 155°C designated (a) and another organic peroxide having the longest half-life at 155°C designated (b), a ratio of half-lives (bt/at) being at least 7 wherein at is the half-life of (a) and bt is the half-life of (b), a total content of the organic peroxides being 0.1-0.9 pbw per 100 pbw of the base rubber.
一种高尔夫球,其特征在于包括作为组成成分的橡胶组合物的模塑和硫化产品,该橡胶组合物包括 100 pbw 的基础橡胶,主要由含有至少 60 wt%顺式-1,4-键的聚丁二烯组成,其门尼粘度(ML1+4,100°C)至少为 30,并使用稀土催化剂合成;15-50 pbw 的不饱和羧酸和/或其金属盐、15-50 pbw 的不饱和羧酸和/或其金属盐,至少 2 pbw 的最高熔点不超过 115°C 的加工助剂,以及至少两种有机过氧化物,包括一种在 155°C 下半衰期最短的有机过氧化物(a)和另一种在 155°C 下半衰期最长的有机过氧化物(b),半衰期之比 (bt/at) 至少为 7,其中 at 为 (a) 的半衰期,bt 为 (b) 的半衰期,有机过氧化物的总含量为 0.1-0.9 pbw/100pbw的基础橡胶。